package chapter21.chapter21_2;//: concurrency/SimpleDaemons.java
// Daemon threads don't prevent the program from ending.

import java.util.concurrent.*;

import static net.mindview.util.Print.*;

public class SimpleDaemons implements Runnable {
    public void run() {
        try {
            while (true) {
                TimeUnit.MILLISECONDS.sleep(100);
                print(Thread.currentThread() + " " + this);
            }
        } catch (InterruptedException e) {
            print("sleep() interrupted");
        }
    }

    public static void main(String[] args) throws Exception {
        for (int i = 0; i < 10; i++) {
            Thread daemon = new Thread(new SimpleDaemons());
            daemon.setDaemon(true); // Must call before start()
            daemon.start();
        }
        print("All daemons started");
        TimeUnit.MILLISECONDS.sleep(100);
    }
} /* Output: (Sample)
All daemons started
Thread[Thread-0,5,main] SimpleDaemons@530daa
Thread[Thread-1,5,main] SimpleDaemons@a62fc3
Thread[Thread-2,5,main] SimpleDaemons@89ae9e
Thread[Thread-3,5,main] SimpleDaemons@1270b73
Thread[Thread-4,5,main] SimpleDaemons@60aeb0
Thread[Thread-5,5,main] SimpleDaemons@16caf43
Thread[Thread-6,5,main] SimpleDaemons@66848c
Thread[Thread-7,5,main] SimpleDaemons@8813f2
Thread[Thread-8,5,main] SimpleDaemons@1d58aae
Thread[Thread-9,5,main] SimpleDaemons@83cc67
...
*///:~
